Pulsar Pulse Nulling Fraction and Emission Height
文献类型：期刊论文
| 作者 | Yuen, Rai1,2,3,4,5 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2025-11-01 |
| 卷号 | 25期号:11页码:115004 |
| 关键词 | stars: neutron (stars:) pulsars: general radiation mechanisms: non-thermal |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/adfb4a |
| 产权排序 | 1 |
| 英文摘要 | We investigate the correlations between radio pulse nulling fraction (NF) and emission height based on simulation of 9000 nulling pulsar samples each with 1000 rotations. Each pulsar is randomly assigned an obliquity and a viewing angle. Visible emission is determined in a geometry, in which the emission is tangential to the local magnetic field lines and aligned with the line of sight. In an emission region with multiple emission segments, a detectable null occurs when a favorable condition is present to trigger switching in plasma density to zero in all the visible segments. The resulting NF distribution is consistent with the latest observations. We find that pulsars with low NFs and large obliquity angles tend to emit from higher heights, and vice versa. We demonstrate that variation in the NF is large among pulsars with low emission heights. However, the variation decreases and the NFs tend to be low for pulsars with emission at higher heights. We show that the NF exhibits varying correlation with the rotation period. Our results indicate that younger pulsars tend to null at higher emission heights than older pulsars. This suggests weakening of the radio emission mechanism with height as a pulsar ages. |
| WOS关键词 | RADIO-EMISSION ; DRIFTING SUBPULSES ; INTENSITY MEASUREMENTS ; PAIR PRODUCTION ; POLAR CAPS ; MODEL ; POLARIZATION ; PLASMA ; MAGNETOSPHERE ; ALTITUDE |
| 资助项目 | National Natural Science Foundation of China (NSFC)[12288102] ; National Key Program for Science and Technology Research and Development[2022YFC2205201] ; National SKA Program of China[2020SKA0120200] ; National Natural Science Foundation of China (NSFC) project[12041303] ; National Natural Science Foundation of China (NSFC) project[12041304] ; Major Science and Technology Program of Xinjiang Uygur Autonomous Region[2022A03013-2] ; Major Science and Technology Program of Xinjiang Uygur Autonomous Region[2022A03013-4] ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Ministry of Finance of China |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001574445500001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; National Key Program for Science and Technology Research and Development ; National SKA Program of China ; National Natural Science Foundation of China (NSFC) project ; Major Science and Technology Program of Xinjiang Uygur Autonomous Region ; Operation, Maintenance and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Ministry of Finance of China |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/8154]  |
| 专题 | 脉冲星研究团组 |
| 通讯作者 | Yuen, Rai |
| 作者单位 | 1.State Key Lab Radio Astron & Technol, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 3.Univ Sydney, Sch Phys, SIfA, Sydney, NSW 2006, Australia 4.Chinese Acad Sci, Key Lab Radio Astron & Technol, Beijing 100101, Peoples R China 5.Chinese Acad Sci, Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuen, Rai. Pulsar Pulse Nulling Fraction and Emission Height[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2025,25(11):115004. |
| APA | Yuen, Rai.(2025).Pulsar Pulse Nulling Fraction and Emission Height.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,25(11),115004. |
| MLA | Yuen, Rai."Pulsar Pulse Nulling Fraction and Emission Height".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 25.11(2025):115004. |
入库方式： OAI收割
来源：新疆天文台
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